Tuncay scored just seven goals for Stoke this season and has failed to make an impact at the Britannia Stadium.
Tuncay joined Stoke from Middlesbrough last year.
Sunderland boss Steve Bruce is keen to take the striker back to the north east.
Tuncay scored just seven goals for Stoke this season and has failed to make an impact at the Britannia Stadium.
Tuncay joined Stoke from Middlesbrough last year.
Sunderland boss Steve Bruce is keen to take the striker back to the north east.
